| 摘要 |
PROBLEM TO BE SOLVED: To prevent a clutch spring from being fatigue-failed in a spring clutch performing the transmission and cutting off of a rotating torque between a pulley and a pulley hub assembled therein by an increase and decrease in diameter of the clutch spring. SOLUTION: The pulley hub 2 assembled in the pulley 1 is formed of an output shaft 2a and a sleeve 2b lockingly fitted to the outside of the output shaft. The outer peripheral surface of the clutch spring 12 is elastically brought into contact with a cylindrical clutch face 11 formed on the inner periphery of the pulley 1, one end part of the clutch spring 12 is formed integrally with a spring fixing member 13, and the spring fixing member 13 is locked to the sleeve 2b. Accordingly, since the clutch spring 12 can be increased or decreased in diameter without producing the bending of the clutch spring 12, the clutch spring 12 can be prevented from being fatigue-failed. COPYRIGHT: (C)2006,JPO&NCIPI
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